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Initial velocity of an object

by StupidGenius
Tags: initial, object, velocity
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StupidGenius
#1
Mar30-09, 07:01 PM
P: 19
1. The problem statement, all variables and given/known data
What was the initial velocity of an object that moved 120m in 5.60s, reaching a final velocity of 15.0m/s in that time?


2. Relevant equations
v=d/t
a=v2-v1/t2-t1



3. The attempt at a solution
I was wondering is there an acceleration that i'm missing here? or am i just off?
I've been using this eq. v1=v2-a(changeintime)
Someone help :(
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physicsman2
#2
Mar30-09, 07:07 PM
P: 140
was the object at rest?
StupidGenius
#3
Mar30-09, 07:32 PM
P: 19
The book's answer is 28 m/s =S


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